A glance at any common map will show that, at about sixteen degrees, or eleven hundred miles, from the line, at the boundary of the tropical rains, the river Nile divides into two branches--the White river and the Blue river. The White river runs very nearly north and south; the Blue river, bending towards the east, comes from Ethiopia, or, as we term it, Abyssinia. Now a question naturally arises, Which of these two rivers is the principal stream? The Ethiopians have, of course, always claimed that distinction for the Blue river; and Cambyses, Alexander, Ptolemy, and almost every one down to Bruce, looked to Ethiopia for the sources of the Nile; but it is indisputably settled that the White river is the main branch or artery of the Nile. Nay, much to Bruce's honour, he himself admits this; and states not only that the White river is by far the larger and deeper of the two, but that it evidently proceeds from a more remote source; since, instead of periodically rising and falling as the Blue river does (which shows that the latter depends on the tropical rains), the waters of the White river are unceasingly flowing; which, as Bruce justly remarks, denotes that this river is fed by those distant rains which are known to be always falling in the neighbourhood of the equator. Our candid traveller adds, that if it were not for the constant supply of the White river, the waters of the Blue or Abyssinian river (which is formed by the union of three great streams, the Mareb, the Bowiha, and the Tacazzé) would be absorbed in the sands of the desert of Nubia, and that the Nile would consequently never reach Egypt. The real source of the Nile, therefore, still remains unknown, or, rather, it hangs in the equatorial clouds from which the rains that feed it descend. Bruce, who had hazarded everything to solve the Quixotical problem of his day, naturally clings to the fact that the Blue river was in Abyssinia, and even in Sennaar considered as the true Nile. His statement has lately been corroborated by Burckhardt, who, in his Travels to Nubia in 1816, says, "It is usual with the native Arabs to call the branch of the river on which Sennaar lies, and which rises in Abyssinia, by the name Nil, as well as that of Bahr el Azrek (Blue river). Thus every one says that Sennaar is situated on the Nile; so far, therefore, Bruce is justified in styling himself the discoverer of the Nile; but I have often heard the Sennaar merchants declare, that the Bahr el Abyad (White river), which is the name invariably given to the more western branch, is considerably larger than the Nile." But the Blue river was not only looked upon as the Nile in Nubia and Abyssinia; it had also been always so considered in Europe; and Bruce accordingly did reach the goal which human curiosity had so long been striving to attain.